Service manual

U.S.B doesn't Work
Check USB M/B
CN6 PIN1,2
Device Problem
Check USB M/B
U3 3.3V
Change Scalar M/B
Change USB M/B
NG
NG
NG
Change USB M/B
NG
Check USB M/B
FUSE F1~F4
Short
Check USB M/B
R20 5V
Change USB M/B
Viewsonic Corporation 59 VP2130b-1 Confidential - Do Not Copy